CN206073488U - The air-cooled refrigeration system of auxiliary that vertical downstream directly contact condenses - Google Patents

Abstract

The utility model discloses a vertical auxiliary air-cooled refrigerating system which directly contacts and condenses along the flow. The utility model includes a refrigeration compressor, an oil separator, an auxiliary air-cooled heat exchanger, a first solenoid valve, a second solenoid valve, a third solenoid valve, a vertical downstream direct contact condensation heat exchanger, a fourth solenoid valve, Throttle valve, liquid pump, evaporator, liquid reservoir, liquid baffle, nozzle and shell; the vertical downstream direct contact condensation heat exchanger is composed of shell, liquid baffle and nozzle, and the inlet of the nozzle is connected with The liquid supply pipe is connected and evenly distributed on the upper part of the shell, the outlet of the nozzle faces upward, and the liquid baffle is welded to the inside of the shell at equal distances; the outlet of the refrigeration compressor is divided into two paths after passing through the oil separator, and one path passes through the first solenoid valve It is connected to the inlet of the auxiliary air-cooled heat exchanger, and the other is connected to the gas inlet of the vertical downstream direct contact condensing heat exchanger through the third solenoid valve. The utility model can effectively reduce the exhaust temperature of the refrigeration compressor, reduce the pressure ratio, increase the refrigeration capacity of the refrigeration system, and improve the performance of the refrigeration system. The utility model has the advantages of simple structure, convenient operation, environmental protection and energy saving.

Description

Auxiliary air-cooled refrigeration system with vertical downstream direct contact with condensation

technical field

The utility model relates to the technical field of refrigeration, in particular to a refrigeration system with a vertical downstream direct contact condensation heat transfer auxiliary air cooling.

Background technique

In the current application field of refrigeration and air-conditioning technology, the high-temperature and high-pressure gas discharged from the refrigeration compressor in the conventional air-cooled condensing refrigeration system is taken away by the air cooling medium to cool down and condense into a high-temperature and high-pressure liquid. It is partition-type heat transfer. The heat transfer needs to go through the convective heat transfer of the fluid on both sides and the heat conduction of the heat transfer wall of the heat exchanger. The heat transfer of the heat transfer wall of the heat exchanger is affected by the wall thickness and material, especially the lubrication of the wall accumulation. The heat transfer resistance formed by oil and dirt will increase the thermal resistance of the condensing heat exchanger and reduce the heat transfer coefficient. A large heat transfer temperature difference between the refrigerant and the cooling medium is required to dissipate heat, resulting in an increase in the exhaust temperature of the refrigeration compressor. High, the pressure ratio increases, the volumetric efficiency decreases, the power consumption of the refrigeration compressor increases, and the coefficient of performance of the refrigeration system decreases. Therefore, a condensation heat exchanger that directly contacts condensation is developed to reduce the exhaust temperature of the refrigeration compressor and reduce the pressure Ratio, improve the volumetric efficiency, reduce the power consumption of the refrigeration compressor, improve the performance of the refrigeration system, and achieve energy saving and environmental protection. But there is no embodiment at present.

Utility model content

The purpose of this utility model is to provide a high-temperature and high-pressure refrigerant gas and high-pressure liquid flowing forward to directly contact and condense to assist the air-cooled refrigeration system to improve the operating performance of the refrigeration system for the technical defects of the existing refrigeration system.

The technical scheme adopted for realizing the purpose of this utility model is:

A vertical auxiliary air-cooled refrigeration system with direct contact with condensation, including a refrigeration compressor, an oil separator, an auxiliary air-cooled heat exchanger, a first solenoid valve, a second solenoid valve, a third solenoid valve, a vertical parallel flow The flow directly contacts the condensation heat exchanger, the fourth solenoid valve, the throttle valve, the liquid pump, the evaporator, and the liquid reservoir; the vertical downstream direct contact condensation heat exchanger is composed of a shell, a liquid baffle and a nozzle. The inlet of the nozzle is connected to the liquid supply pipe and evenly distributed on the upper part of the shell, the outlet of the nozzle faces upward, and the liquid baffle is welded to the inside of the shell at equal distances; the outlet of the refrigeration compressor is divided into two paths after passing through the oil separator, and one path passes through The first solenoid valve is connected to the inlet of the auxiliary air-cooled heat exchanger, and the other is connected to the gas inlet pipe of the vertical downstream direct contact condensing heat exchanger through the third solenoid valve, and the vertical downstream condensing heat exchanger The liquid discharge pipe is connected in parallel with the outlet of the first solenoid valve through the second solenoid valve and then connected with the inlet of the auxiliary air-cooled heat exchanger, the outlet of the auxiliary air-cooled heat exchanger is connected with the inlet of the liquid reservoir, and the outlet of the liquid reservoir is divided into Two paths, one path is connected to the liquid supply pipe through the liquid pump and the fourth solenoid valve, the other path is connected to the inlet of the evaporator through the throttle valve, and the outlet of the evaporator is connected to the inlet of the refrigeration compressor.

The auxiliary air-cooled heat exchanger is a finned tube type, the liquid reservoir is a hollow pressure vessel, and its shell is provided with a liquid level gauge, and the liquid pump, the first solenoid valve, the second The opening and closing of the solenoid valve, the third solenoid valve and the fourth solenoid valve.

There are multiple spray heads, the number of which is designed according to the cooling capacity of the refrigeration system, the space size of the vertical downstream direct contact condensing heat exchanger, and the required spray volume.

Compared with the prior art, the beneficial effects of the utility model are:

1. The utility model's vertical auxiliary air-cooled refrigeration system with direct contact with condensation along the flow can effectively reduce the exhaust temperature of the refrigeration compressor by using the high-temperature and high-pressure refrigerant gas to directly contact the liquid with the forward flow to release heat and condense. Reduce the pressure ratio, increase the volumetric efficiency, reduce the power consumption of the refrigeration compressor, and improve the performance of the refrigeration system.

2. The utility model’s vertical auxiliary air-cooled refrigeration system that directly contacts condensation in the downstream uses an auxiliary air-cooled heat exchanger to realize supercooling of high-temperature and high-pressure liquids before throttling and reducing pressure, so that the enthalpy value entering the evaporator is reduced and the enthalpy is improved. The cooling capacity of the refrigeration system is large, and the performance of the refrigeration system is further improved. The structure is simple, the operation is convenient, the environment is protected, and the energy is saved.

Description of drawings

Fig. 1 shows the schematic diagram of the auxiliary air-cooled refrigeration system of the vertical downstream direct contact condensation of the utility model;

Figure 2 is a schematic diagram of the connecting pipes of the vertical co-current direct contact condensation heat exchanger.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

The schematic diagram of the auxiliary air-cooled refrigeration system with vertical downstream direct contact condensation of the utility model is shown in Figure 1-Figure 2, including a refrigeration compressor 1, an oil separator 2, an auxiliary air-cooled heat exchanger 3, and a first solenoid valve 4. Second solenoid valve 5, third solenoid valve 6, vertical downstream direct contact condensation heat exchanger 7, fourth solenoid valve 8, throttle valve 9, liquid pump 10, evaporator 11, liquid reservoir 12, Liquid baffle 13 , spray head 14 and housing 15 .

The vertical downstream direct contact condensing heat exchanger 7 is composed of a housing 15, a liquid baffle 13 and a nozzle 14. The inlet of the nozzle 14 is connected to the liquid supply pipe 18 and evenly distributed on the upper part of the housing 15. The outlet of the nozzle faces On the top, the liquid baffle plate 13 is welded equidistantly inside the shell; the outlet of the refrigeration compressor 1 is divided into two paths after passing through the oil separator 2, and one path is connected to the inlet of the auxiliary air-cooled heat exchanger 3 through the first solenoid valve 4, The other way is connected to the gas inlet connecting pipe 17 of the vertical downstream direct contact condensation heat exchanger 7 through the third solenoid valve 6, and the liquid discharge pipe 16 of the vertical downstream condensation heat exchanger 7 is connected to the gas inlet through the second solenoid valve 5. The outlet of the first electromagnetic valve 4 is connected in parallel with the inlet of the auxiliary air-cooled heat exchanger 3, the outlet of the auxiliary air-cooled heat exchanger 3 is connected with the inlet of the liquid reservoir 12, and the outlet of the liquid reservoir 12 is divided into two paths, one path The liquid pump 10 and the fourth solenoid valve 8 are connected to the liquid supply pipe 18 , and the other path is connected to the inlet of the evaporator 11 through the throttle valve 9 , and the outlet of the evaporator 11 is connected to the inlet of the refrigeration compressor 1 .

The auxiliary air-cooled heat exchanger 3 is a finned tube type, the liquid reservoir 12 is a hollow pressure vessel, and its housing is provided with a liquid level gauge, and the liquid pump 10 and the first electromagnetic valve are automatically controlled by the liquid level float valve. 4. Opening and closing of the second solenoid valve 5, the third solenoid valve 6 and the fourth solenoid valve 8.

There are multiple spray heads, the number of which is designed according to the cooling capacity of the refrigeration system and the space size of the vertical downstream direct contact condensing heat exchanger 7 and the required spray volume.

When the system is started and running, the first solenoid valve 4 is opened, the second solenoid valve 5, the third solenoid valve 6 and the fourth solenoid valve 8 are closed, and the high-temperature and high-pressure refrigerant gas discharged from the refrigeration compressor 1 passes through the oil separator 2 and enters the auxiliary The heat released by the air-cooled heat exchanger 3 condenses into a high-temperature and high-pressure liquid and enters the liquid reservoir 12. The high-temperature and high-pressure liquid from the liquid reservoir 12 is throttled and reduced by the throttle valve 9 to a low-temperature and low-pressure liquid and enters the evaporator 11. The low-temperature and low-pressure liquid The refrigerant liquid absorbs external heat in the evaporator 11 to provide a cold source for the cold space, and the evaporated low-temperature and low-pressure gas enters the refrigeration compressor 1; when a certain amount of liquid is accumulated in the liquid receiver 12, the liquid level reaches the set height, The action of the float valve activates the liquid pump 10, the fourth electromagnetic valve 8 opens, and at the same time the action causes the first electromagnetic valve 4 to close, the second electromagnetic valve 5 and the third electromagnetic valve 6 to open, and the liquid from the auxiliary air-cooled heat exchanger 3 enters The liquid reservoir 12, part of the liquid from the liquid reservoir 12 passes through the liquid pump 10, the fourth electromagnetic valve 8, and sprays into the vertical downstream through the nozzle 14 to directly contact the inner space of the condensation heat exchanger 7. At the same time, the refrigeration compressor 1 The exhausted high-temperature and high-pressure gas enters the interior of the vertical direct contact condensation heat exchanger 7 through the second solenoid valve 5 and directly contacts the liquid ejected from the nozzle for heat exchange, and the condensation liquid accumulated at the bottom enters the auxiliary air flow through the third solenoid valve 6. The heat exchange tube of the cold heat exchanger 3 exchanges heat with the outside air to release heat for supercooling, and the supercooled liquid at the outlet of the auxiliary air-cooled heat exchanger 3 is divided into two paths, one path passes through the liquid pump 10, the fourth solenoid valve 8, and the nozzle 14 Spray into the vertical downstream and directly contact the condensing heat exchanger 7, and the other way passes through the throttling valve 9 to reduce the pressure to a low-temperature and low-pressure liquid and enter the evaporator 11, and the low-temperature and low-pressure refrigerant liquid absorbs external heat in the evaporator 11 In order to provide a cold source for the cold space, the evaporated low-temperature and low-pressure gas enters the refrigeration compressor 1 .

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these Improvement and retouching should also be regarded as the protection scope of the present utility model.

Claims (2)

1. the air-cooled refrigeration system of auxiliary that a kind of vertical downstream directly contact condenses, it is characterised in that including refrigeration compressor, oil Separator, auxiliary air cooling heat exchanger, the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, vertical downstream directly contact condense and change Hot device, the 4th electromagnetic valve, choke valve, liquid pump, vaporizer and liquid reservoir；The vertical downstream directly contact condensing heat exchanger by Housing, liquid barrier and shower nozzle composition, the entrance of shower nozzle are connected and are uniformly distributed in the top of housing, jet expansion court with feed pipe On, liquid barrier is equidistant to be welded in enclosure interior；The outlet of refrigeration compressor is divided into two-way, a-road-through after oil eliminator The entrance that the first electromagnetic valve is crossed with auxiliary air cooling heat exchanger is connected, and separately leads up to the 3rd electromagnetic valve and vertical downstream directly contact The gas access adapter connection of condensing heat exchanger, the discharging tube of the vertical downstream condensing heat exchanger pass through the second electromagnetic valve and the It is connected with the entrance of auxiliary air cooling heat exchanger after the outlet parallel connection of one electromagnetic valve, aids in outlet and the liquid reservoir of air cooling heat exchanger Entrance connects, and the outlet of liquid reservoir is divided into two-way, is connected with feed pipe through liquid pump and the 4th electromagnetic valve all the way, another road Jing Cross choke valve to be connected with the entrance of vaporizer, the outlet of vaporizer is connected with the entrance of refrigeration compressor.

2. the air-cooled refrigeration system of auxiliary that vertical downstream directly contact according to claim 1 condenses, it is characterised in that institute It is fin tube type to state auxiliary air cooling heat exchanger, and liquid reservoir is hollow pressure vessel, and the housing of liquid reservoir is provided with liquidometer, and leads to Cross liquid-level floater valve and automatically control opening for liquid pump, the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve and the 4th electromagnetic valve Close.